Chameleon Genshi rendering engine support for TG2.3.2+
Insire your config/app_cfg.py register the ChameleonGenshi renderer:
from tgext.chameleon_genshi import ChameleonGenshiRenderer
base_config.register_rendering_engine(ChameleonGenshiRenderer)
base_config.renderers.append('chameleon_genshi')